I have seen concern expressed about the effect of long term use of Apple Cider Vinegar internally on tooth enamel. I have been using Apple Cider Vinegar for several years now. I put between 1 teaspoon and 1 Tablespoon in 16 ounces or more of water. I drink this almost daily, often several glasses a day. I do use a straw, but just out of preference.
Yesterday I saw my dentist. My tooth enamel is fine after using ACV in water for several years. Now, this is just one person's experience, but I thought I would pass along this information.
~Mama to Many~